@article{SF_1982__24_134533,
     author = {H. Straubing},
     title = {The variety generated by finite nilpotent monoids.},
     journal = {Semigroup forum},
     pages = {25--38},
     publisher = {mathdoc},
     volume = {24},
     year = {1982},
     zbl = {0503.20024},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134533/}
}